3lpe coating and fiber reinforced plastics protection are used for crossing pipes under complex working condition.The combination of these two kinds of coatings has significantly improved the acid resistance, alkali resistance and wear resistance of steel pipes.IMRI can customize various kinds of coatings of different applications and properties, such as 3lpe coating, 3lpp coating, fbe coating, liquid epoxy coating, epoxy coal tar coating, epoxy phenolic resin coating, polyurethane thermal insulation coating, etc.
Specifications:
| Standard | DIN30670 |
| Processing ability | OD:38mm-1620mm;WT:2mm-30mm |
| Length | 6-14m |
| Packing | PE/BE,Plastic cap,bundling |
| Technique | External surface on Welded pipe or seamless pipe |
| Application | Oil and Gas field，chemical engineering，energy engineering，water Transportation… |
| Service condition | -40℃,+85℃;alkaline or sour;underground |
| Place of Origin | China |
| MOQ | 3 pices |
| Transportation | 1.Sea port:Tianjin Xingang port,Qingdao port,Shanghai Luojing port →America,Europe,Africa,Middle East,India, Pakistan,Japan,Korea, Australia…(shipping) 2.Land port:Alataw pass port(Пограничный пункт “Алашанькоу”) |
| Type of DIN30670 3LPE/3PE coating | ||
| Type | N | S |
| Design temperatures for sintered polyethylene coatings |
from −20 °C up to +50 °C | from −40 °C up to +70 °C |
| Design temperatures for extruded polyethylene coatings |
from −20 °C up to +60 °C | from −40 °C up to +80 °C |
| Coating thickness of 3LPE | ||
| Nominal size DN | normal (n) | increased (v) |
| DN≤ 100 | 1,8 | 2,5 |
| 100< DN≤ 250 | 2,0 | 2,7 |
| 250 < DN< 500 | 2,2 | 2,9 |
| 500 ≤ DN <800 | 2,5 | 3,2 |
| DN ≥800 | 3,0 | 3,7 |
| DIN30670 3LPE/3PE Coating Performance | |||
| Property | Requirement | Testing as in | Notes |
| Degree of cure of epoxy resin | ΔTg according to the manufacturer’s specification | Annex B | |
| Cathodic disbondment (CD test) | 23 °C/28 d or 60 °C/2 d max. 7 mm | Annex C | Applies only to three layer coatings |
| Peel strengthb | Type N: 100 N/cm (23 °C) 20 N/cm (50 °C) Type S: 150 N/cm (23 °C) 30 N/cm (70 °C) |
Annex D | For system testing single values shall be no more than 25 % lower than the required average value. |
| Continuity (holiday detection) | No discharges | Annex E | 25 kV test |
| Elongation at break (23 °C ± 2 °C) | min. 400 % | Annex F | |
| Impact resistance (23 °C ± 2 °C) | Type N: ≥ 5 J/mm Type S: ≥ 7 J/mm |
Annex H | 25 kV test No discharges |
| Low temperature impact resistance | Type N: ≥ 5 J/mm (−20 °C ± 2 °C) Type S: ≥ 7 J/mm (−40 °C ± 2 °C) |
Annex H | 25 kV test No discharges |
| Indentation resistance | Type N: max. 0,2 mm (23 °C) max. 0,3 mm (50 °C) Type S: max. 0,2 mm (23 °C) max. 0,4 mm (70 °C) |
Annex I | |
| Specific electrical coating resistance (23 °C ± 2 °C) | ≥ 108Ωm² | Annex J | |
| UV resistance | ΔMFR ± 35 % | Annex K | |
| Thermal ageing resistance | ΔMFR ± 35 % | Annex L | |
